This is one of those things that baits you in with a trashy premise and hooks you in with en even trashier premise about a pervert who only cares about the wellbeing of highschool girls in a post-apocalyptic world with highschool girl aliens Parasyte style.
I think the aliens where reading his work and that was the thing who motivated all this crap. Hence they call him "sensei" but more of a sensei mangaka ?
This shit is way better than Kyou Mei Machi which has a very similar general premise (hurr durr the women/girls are monsters, if you get infected you become one of them breh) but took itself way too seriously.